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Christopherfest
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Registered: ‎07-08-2019
Location: US
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Message 1 of 11

T470s / 40A20170US external display issues after 1903

Good afternoon,

 

I'm experiencing an issue with all of our T470s' docked on a  40A20170US. After updating to Windows 10 1903, the external monitors won't turn back on unless laptop is physically un-docked/re-docked. 

 

What I have tried:

Installed all updates via Lenovo Vantage (including firmware and bios)

All Windows updates

Made sure docking stations have latest firmware

Tried sleep and or hybernation as well as default power settings

Leaving laptop open

Working with CDW support who said I tried everything they would try

 

Example Setup:

T470s ---> 40A20170US -----> (via 2x display ports on dock) -----> (2x VGA ports) on HP VH240a

 

***When remoting in with logmein, I can remotely see all displays

 

T470s

https://www.cdw.com/product/lvo-tp-t470s-i7-6600u-256gb-8gb-w710/4512966?pfm=cmp

 

40A20170US

https://www.cdw.com/product/Lenovo-ThinkPad-Ultra-Dock-port-replicator-VGA-DVI-HDMI-2-x-DP/3154444?

 

Thank-you for your assistance in this matter

 

-Chris

JDGillis
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Message 2 of 11

Re: T470s / 40A20170US external display issues after 1903

This has been reported by others in this forum thread but it provides no solution.    My guess is that a new display driver may be needed. 

 

I am curious, does the pressing the left  SHIFT + CTRL +WinKey + B (resets graphics adapter) cause the external screens to wake up?

 

 

Cheers,

 

 

Christopherfest
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Message 3 of 11

Re: T470s / 40A20170US external display issues after 1903

 I will try this tomorrow morning and report back. Otherwise, will follow the other thread.

Thanks for the assistance!

Chris

Christopherfest
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Message 4 of 11

Re: T470s / 40A20170US external display issues after 1903

Hitting Shift + Ctrl + Winkey + B turned both monitors to duplicate the display without the Windows login (Second screen is usually black on login but you can see the cursor on it)

JDGillis
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Message 5 of 11

Re: T470s / 40A20170US external display issues after 1903

So it did light up the screens, but there was just no way to login (even even using CTRL+ALT+DEL etc)

 

What graphics driver are you systems running, the 25.20.100.6472 one from Lenovo, or the 26.20.100.6912 one from Intel?      If you are using the older Lenovo version that was released prior to 1903, then you may want to try the later Intel driver on one of the system to see if that helps. 

 

The Driver from Intel is a bit of a pain to install, because you first have to switch to the default Windows 10 graphics driver, or the installer will exit out and point to you back to your OEM.

 

If you want to try the latest Intel driver, here are the steps to install them.

 

Before starting, download the latest Intel DCH driver for your graphics adapter, and disconnect your dock or any other external monitors for the time being.

 

Downloads for Intel® HD Graphics 520

https://downloadcenter.intel.com/product/88355/Intel-HD-Graphics-520

 

Downloads for Intel® HD Graphics 620

https://downloadcenter.intel.com/product/96551/Intel-HD-Graphics-620

 

Switch to Microsoft Basic Display Adapter

  • Right-click on Start and select Device Manager

  • Expand the "Display Adapters" section, and then double-click on your Intel HD Graphics adapter

  • Select the Driver tab -> "Update Driver" -> "Browse my computer for driver software" -> "Let me pick from a list of available drivers on my computer"

  • Select “Microsoft Basic Display Adapter”

  • Click “Next” (note that your screen resolution will probably change) when it switches to the basic driver)

  • Close Device Manager

You should now be able to launch and install the latest Intel DCH driver installation successfully.  

 

 

Best of luck,

 

 

 

Christopherfest
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Message 6 of 11

Re: T470s / 40A20170US external display issues after 1903

Correct, it gave me a duplication of the off screen when loggin in with multiple monitors. I can see the cursor but not the screen that would be used to login.

 

HD Graphics 520

Driver: 25.20.200.6472

 

I'll update and report back tomorrow morning with results. Thank-you for your assistance in this matter!

Christopherfest
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Message 7 of 11

Re: T470s / 40A20170US external display issues after 1903

Single tap to the docking station turned all monitors on and in correct position! I'll keep updating each morning but feel like that graphics driver update did the trick

Christopherfest
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Message 8 of 11

Re: T470s / 40A20170US external display issues after 1903

Worked today as well. Thanks again for the 26.20.100.6912 recommendation!

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JDGillis
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Message 9 of 11

Re: T470s / 40A20170US external display issues after 1903

You are welcome, I am glad to hear that it is working 

 

Cheers,

Christopherfest
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Message 10 of 11

Re: T470s / 40A20170US external display issues after 1903

After using it for a week, it looks like this fix has worked most of the time. When it doesn't, I can hit the power button on my laptop, and then the power button on the docking station. Doing so will wake both monitors up

The common denominator on when I must do the above: Choosing to "lock" vs "sign off" end of day.

 

 

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